Cellular Phone Entry System With Dual Power And Secure Credential Management
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Solution Overview
Problem
Current communication apparatuses, such as cellular phones, face challenges in securely handling and managing entry information for vehicles and facilities, particularly in preventing leakage and forgery of entry codes, and ensuring continuous functionality despite power source fluctuations.
Innovation Solution
A cellular phone structure that includes a telephone line communication part, an entry qualification holding part, and an entry communication part for transmitting fixed-term entry qualification information, with a control part for updating and managing this information, and separate power sources to maintain functionality regardless of the main power source's state, utilizing both short-range and telephone line communication for secure and adaptive entry operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If entry qualification information is received via telephone line communication, then long-distance entry code transmission is enabled, but vulnerability to leakage and forgery increases
Solution Approach 1:
The system performs preliminary actions by receiving and storing entry qualification information via telephone line communication before actual entry operations. The control part updates the entry qualification information in advance, ensuring that valid credentials are stored securely in the entry qualification holding part before they are needed for keyless entry, thus enabling long-distance transmission while maintaining security through pre-validated information
Solution Approach 2:
The patent implements a mechanism where entry qualification information has a limited validity period and is periodically updated. The control part automatically updates the entry qualification information, making previous versions obsolete. This approach treats entry codes as temporary, disposable credentials that are frequently renewed, reducing the risk associated with long-term storage of static entry codes transmitted via telephone lines
2Device complexity
If a single main power source is used, then device structure is simplified, but entry functionality cannot be maintained when power source is exhausted or malfunctioning
Solution Approach 1:
The power supply system is segmented into two independent parts: a main power source for general device operations and an auxiliary power source specifically dedicated to the entry qualification holding part and entry communication part. This segmentation ensures that the critical entry functionality remains operational even when the main power source fails or is exhausted, as the auxiliary power source independently maintains the entry system
Solution Approach 2:
The auxiliary power source serves as a pre-prepared backup mechanism that cushions against power source failures. Before the main power source fails completely, the auxiliary power source is already in place and can immediately take over to maintain entry functionality, preventing service interruption without requiring complex real-time power management
3Reliability
If fixed-term entry qualification information is used, then security against leakage and forgery is improved, but frequent updates increase communication overhead
Solution Approach 1:
The control part implements periodic updates of entry qualification information, where updates occur at predetermined intervals or under specific conditions. This periodic action balances security requirements with communication efficiency by not updating information unnecessarily, thus maintaining security through regular refreshes while avoiding excessive communication overhead during stable periods
Solution Approach 2:
The system incorporates feedback mechanisms where the control part monitors the validity period and state of entry qualification information. Updates are triggered based on feedback from the system state (e.g., when information approaches expiration or when security conditions change), allowing the system to maintain security while optimizing communication timing based on actual needs rather than fixed schedules
Data Source
AI summary
A cellular phone includes a telephone line communication part, a telephone functional part for making a telephone call via the telephone line communication part, an entry qualification holding part for holding fixed-term entry qualification information in which an entry target is specified, which is received via the telephone line communication part, and an entry communication part for transmitting the fixed-term entry qualification information held by the entry qualification holding part.